These words all have the word root, which means "to go against":
competition, compete, competitor
What is "compet-".
This prefix means "one", as in these words:
monotone, monopoly, monogamous
What is "mono-".
These words all have this suffix in common, which means "one who":
Decomposer, consumer, producer
What is "-er."
These words all have this word root in common, which means "plants":
herbivore, herbaceous, herbivorous
What is "herb-".
This prefix also means "one," as in:
unicorn, unicellular, unicycle
What is "uni-".
This is a suffix meaning "one who," as in the following words:
biologist, geologist, chemist
What is "-ist".
These words all have this word root, which means "to change or modify":
adaptation, adapting, adapted
What is "adapt-".
This prefix means "two," as in:
diploid, dichotomy
What is "di-".
This is a suffix that means "place for; or one who," as in:
glossary, library, secretary
What is "-ary".
This is a word root meaning, "to move from one area to another," as in these words:
Immigrate, migration, emigrate
What is "migra-".
This is another prefix that also means "two," as in:
bicycle, binary, bilingual
What is "bi-".
This is a suffix that means, "relating to," as in:
energetic, historic, caustic
What is "-ic".
This word part means "study of":
Ecology, geology, dendrology
What is "-ology".
This is a prefix that means "three," as in
tricycle, triangle, tripod
What is "tri-".
This is a suffix that means "having the quality of," as in:
childish, selfish, boyish
What is "-ish".